Rubies have long been celebrated for their vibrant red hue, durability, and timeless beauty. As one of the most prized gemstones in the world, they are often set into exquisite jewelry pieces that are meant to last a lifetime. However, questions often arise regarding their hardness and susceptibility to scratches, especially when they come into contact with other gemstones. Understanding whether rubies can get scratched by other stones is essential for jewelry owners, collectors, and gemstone enthusiasts alike. This article delves into the hardness of rubies, their interactions with other gemstones, and how to best care for and protect these precious gems.
Can Rubies Get Scratched by Other Gemstones?
At a glance, rubies are renowned for their remarkable hardness, which makes them suitable for everyday wear. But despite their durability, they are not entirely scratch-proof. The answer to whether rubies can get scratched by other gemstones depends largely on the hardness of the stones involved and how they are worn or stored. To fully understand this, it’s important to explore the Mohs scale of mineral hardness, the hardness of common gemstones, and the specific characteristics of rubies.
Understanding the Mohs Scale of Hardness
The Mohs scale of mineral hardness is a qualitative scale that ranks minerals based on their ability to resist scratching by other substances. It ranges from 1 (talc, the softest) to 10 (diamond, the hardest). Gemstones are often compared using this scale to determine their relative hardness and scratch resistance.
Rubies are a variety of corundum, which has a hardness of 9 on the Mohs scale. This places them among the hardest gemstones, second only to diamonds. Their high hardness makes them quite resistant to scratches, but not invulnerable. Stones with a Mohs hardness equal to or greater than 9 can scratch rubies, while those with lower hardness levels are less likely to cause scratches.
Gemstones That Can Scratch Rubies
- Diamonds (Mohs 10): As the hardest known natural substance, diamonds can easily scratch rubies. This is why diamond-tipped tools are used in cutting and shaping rubies, and why diamond jewelry should be stored separately from ruby jewelry to prevent scratches.
- Pink Star (Mohs 10): Similar to diamonds, some synthetic or treated gemstones with a Mohs hardness of 10 can scratch rubies.
- Other corundum varieties (Mohs 9): Sapphires, which are also varieties of corundum, share the same hardness as rubies. Therefore, they cannot scratch each other but can scratch softer stones.
- Topaz (Mohs 8): Topaz is softer than ruby, so it generally cannot scratch a ruby, but a ruby can scratch topaz.
- Quartz (Mohs 7): Quartz cannot scratch rubies, but rubies can scratch quartz.
In practical terms, any gemstone with a hardness of 9 or higher can scratch a ruby if sufficient force is applied. Conversely, softer stones are unlikely to cause scratches on rubies but can be scratched by rubies if they are exposed to enough pressure.
Physical Factors That Influence Scratch Risk
While hardness provides a baseline understanding, other factors also influence the likelihood of scratches occurring:
- Jewelry setting and wear: Rings, bracelets, and other jewelry pieces are more prone to knocks and scratches during daily activities. Proper settings that protect the gemstone can reduce damage.
- Contact and rubbing: Frequent contact with other jewelry or rough surfaces can cause scratches, especially if the contact involves harder gemstones.
- Surface quality and inclusions: Rubies often contain natural inclusions. These imperfections can sometimes weaken the surface, making scratches more likely in specific areas.
- Handling and storage: Proper storage, such as separate compartments or padded jewelry boxes, minimizes accidental contact with harder or abrasive stones.
Protecting Rubies from Scratches
Given their high hardness, rubies are reasonably resistant to scratches, but caution is still advised. Here are some tips to protect your ruby jewelry:
- Avoid contact with harder gemstones: Keep ruby jewelry separate from diamond and other high-hardness stones when not worn.
- Remove jewelry during activities: Take off ruby rings or bracelets when doing tasks that involve potential knocks or abrasions, such as gardening, cleaning, or heavy physical work.
- Use protective settings: Choose jewelry settings that safeguard the gemstone's surface, such as bezel settings, which encase the gem and reduce exposure to scratches.
- Store properly: Use soft pouches or lined jewelry boxes to prevent contact with other pieces that might scratch the ruby.
- Regular inspections and cleaning: Maintain your ruby jewelry to ensure it remains in good condition, and address any surface damage promptly.
Myth Busting: Are Rubies Scratch-Proof?
Despite their impressive hardness, rubies are not scratch-proof. It’s a common myth that they cannot be scratched under any circumstances. As explained earlier, any gemstone with a Mohs hardness of 9 or above can scratch rubies. This means that diamonds, the hardest gemstone, can easily leave scratches on rubies if contact occurs. However, rubies are highly resistant to everyday scratches from most common materials like glass, quartz, or topaz.
Therefore, while rubies are durable and suitable for daily wear, they still require proper care and handling to maintain their luster and appearance over time. Avoid exposing them to rough handling or contact with harder stones, and store them carefully to preserve their beauty.
Summary: Key Takeaways About Ruby Durability and Scratch Resistance
In conclusion, rubies are among the most durable gemstones, thanks to their high hardness of 9 on the Mohs scale. They are highly resistant to scratches from softer materials like quartz and topaz. However, they can be scratched by harder gemstones, most notably diamonds and other corundum varieties. Proper handling, storage, and protective settings are essential to prevent scratches and preserve the gemstone’s brilliance. While rubies are robust and suitable for everyday wear, understanding their interactions with other stones can help jewelry owners make informed decisions to keep their cherished pieces pristine for years to come.